digraph g {
	"main()" [shape=box, rank=min]
	"main()" -> "multiply(2, 3)" -> {"x_in = 2" "y_in = 3"};

	"multiply()" [shape=box, rank=min];
	"multiply()" ->
	// Rank adjustment
	{ rank = same; "x = x_in" "y = y_in" }
	{ rank = same; "int result = 0"; "while (x > 0)"; "System.out.println(result)"; "return result"; }
	{ rank = same; "result += y"; "x--"; }
	// Control flow
	"multiply()" -> "int result = 0" [style=bold];
	"multiply()" -> "while (x > 0)" [style=bold];
	"multiply()" -> "System.out.println(result)" [style=bold];
	"multiply()" -> "return result" [style=bold];
	"while (x > 0)" -> "result += y" [style=bold];
	"while (x > 0)" -> "x--" [style=bold];
	// Data flow
	{ edge [color = red]
		{"int result = 0" "result += y"} -> {"result += y" "System.out.println(result)" "return result"};
		{"x--" "x = x_in"} -> {"x--" "while (x > 0)"};
		"y = y_in" -> "result += y";
	}
	// Order adjustment
	{ edge [style = invis];
		"int result = 0" -> "while (x > 0)";
		"while (x > 0)" -> "System.out.println(result)";
		"System.out.println(result)" -> "return result";
		"result += y" -> "x--";
		"x = x_in" -> "int result = 0";
	}
}